diff --git a/local-cli/setup_env.sh b/local-cli/setup_env.sh
index 983cc8d6f..87a722b5c 100755
--- a/local-cli/setup_env.sh
+++ b/local-cli/setup_env.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 # Copyright (c) 2015-present, Facebook, Inc.
 # All rights reserved.
 #